One of the only concerns I've had about the VTAB has been the micro USB power port. Before I purchased it at Sam's, their demo wouldn't work because the power port went bad. Now, mine is very loose and the cable has to be jammed up for the unit to charge. I've tried several different cables that work with other Micro-usb ports on my Kindle and phone - they all are loose, so I think the problem is internal. Any one else have this problem? What did you do about it? Thanks in advance!